Operating mechanism for pull-sockets.



APPLIGATION FILED MAY 6, 1912.

,Patented Feb. 18, 1913.

INVENTOR A TTORNEV Folks runs In um; wumncm c.

HARVEY HUBBELL, OF'IBRIDGEPORT, CONNECTICUT.

OPERATING MECHANISM FOR PULL-S OCKETS.

Specification of Letters Patent. Patented-Feb. 18,-191i3.

Application filed- May 6, 1912. Serial No. 695,475.

Tqall whom it may concern Be. it. known that I, HARVEY HUBBEL acitizen'of the United States, residing at Bridgeport, County ofFairfield, State of Connecticut, have invented an Improvementin-Operating Mechanism for Pull-Sockets,

of which the following is a specification.

Thisinvention relates to pull sockets for incandescent electric lampsand has for its object to provide operating mechanism therefor located:externally to the shell, which shall dispense with the use of a chainwithin the shell, thus doing away with the part most likely to break anda frequent- Cause of trouble in pull sockets as ordinarily constructed,and which may be readily attached, detached, reversed and adjusted toplace the pendant close to or at any required distance from the shell ifused in connection with a globe, shade or husk, all changes and repairsbeing made without disturbing the switch mechanism, shell or cap.

With these and other objects in view, I have devised the novel switchoperating mechanism ofwhich the following descrip- %n in connection withthe accompanying awing is a specification, reference characters beingused to indicate the several parts .2 Figure 1 is an elevation of a pullsocket partly broken away toshow a switch mechanism and showing theapplication thereto ofmy noveloperating mechanism; Fig 2, anelevation'of a pull socketin a reversed position showing the manner inwhich the operating mechanism may be reversed; F 1g. 3, a perspectiveofthe hub and its bracket detached; Fig. 4, a front elevation of the huband bracket with thelocking spring in lace;'Fig. 5, anelevation of thetwo-part bracket and operating lever detached; Fig. 6, a side elevationof the two-part bracket .and operating lever detached, the bracket beingelongated; Fig. 7 a plan view corresponding therewith; Fig. 8, a planview on an enlarged scale of the operating member and operating bardetached; Fig. 9, an edge yiew corresponding therewith Fig. 10, aperspective also on an enlarged scale of an ex-.

tension piece for the'operating' bar detached;

and Fig. 11 isa detail view of the operating lever and. the two-partbracket detached, showing the parts free to swing indepelldeutly. a

5 312 denotes'the socket shell, 13 the cap, 14 the insulating lining,.15 the screw shell, 16 andI? the ins ulating blocks, 18 one of thecurrent carrying brackets by'which the insulating blocks are connected,19-the switch mechanism, 20 an operating member there for and 21arr-operating bar which connects the operating member of the switch tothe.

operating lever are independent of the shell not in the circuit. The hubis provided in its outer face with recesses 30 and .in one side-with aslot 31 adapted to receive one arm of a U-shaped locking spring 32 aswill i be more fully explained. Bracket members.

are cut away at their outer ends and inner sides at the top to form arecess 33 which receives the operating lever freely. -The members arealso provided with lugs 34 whichare received in recesses 30 in the huband with vertical grooves or slots 35, either of whichis adapted to beengaged by the arm of the locking spring lying in slot 31 in the hubwhen the groove and slot are in alinement to detachably secure thetwo-part bracket to the hub. At the inner ends of the members are bevels88 which make it easy to expand the spring when the bracket 1 is forcedinto the hub after which the spring engages one of the grooves 35. Whenthe two.part bracket is elongated as in Figs. 6 and 7, it is-preferablyadditionally provided with a lug or lugs 36 which engage the face of thehub to give an additional bearing point-land prevent tilting of thebracket. Where a short bracket is used, as in Figs.

1 and 2, the arms 27 of the bracket members I are in engagement with theface of the hub and form an additional bearing for the bracket upon thehub.

The inner end of operating bar 21 is pivoted to the operating member, asat 37, and

the outer end is detachably connected to the operating lever. Inpractice, I"p referably use an lnsulating operat ng member wh ch I willnot now describe in detail as specifically it forms no portion of thepresent'invent-ion 1 and is moreover described and claimed in anotherapplication for Letters Patent. In the present instance I have shown theoperating bar as provided with a slot 22 which is adapted to 'engage'ahook 239 on the operating lever. In addition to the insulation of theoperating bar from the switch .mecha- IllSlIl by means of theins'ulating operating member, it should be understood that the operatingbar passesireely through the hub and two-part bracket. having no contactwith either and that the hub and bracket are themselves insulated asthey have no contact with any parts except the insulating blocks.

I Should it be required to use. a pull socket in connection with aglobe, shade or husk, and carry the pendant away from the shell, theonly change required is to provide a twopart bracketof the requiredlength and to use-an extension piece 40 in connection with the operatingbar.- In Figs. (3 and 7, I have. illustrated an elongated two-partbracket comprising two elongated bracket members formed as before withthe addition of stop lug or lugs 36; The slot 22 at the'outer end of theoperating bar is adapted to be engaged by hook 39 on the operating leveror by. a hook 41 on an extension piece 40 (see Fig. 10) which is itselfprovided with a slot 42 adapted to be engaged by the hook on theoperating lever. It will, of course, be understood that extension piecesare provided of any required length to correspond with the additionallengthof the two-part brackets,

that is, the elongation of the bracket members beyond the ordinary shortform, shown in Figs. 1 and ,2. If preferred, the extension ieces may bedis ensed with and operatin I def.

ars of varying engths may be provi To reverse the socket, that is, tochange it from the position shown in'Fig. 1 to that in Fig; 2, orviceversa, it being understood that the operating lever should always.project conditions of use butits power may be.

readily overcome by direct pull outward upon the bracket. As soon as thebracket has been entirely disengaged. from the hub the member's willturn freely on'pivot 23 as clearly shown in Fig. 11, which enables theoperator to readily disengage the operating lever from the operating baror from an extension piece. To reassemble, hook 39 of theoper'ating'lever is engaged with the operating bar, or anextensionpiece, the members of the two-part bracket are swung to place,as in Fig. 6, with the operating bar inclosed by the. concavo-convexmembers and then the end of the bracket is pressed into the hub,

the beveledend of one of the members actbracket to the ing to expand thelocking spring 'which an instant later snaps into the roove 35 in one ofthe bracket members, tius locking the hub. It is unnecessarv in makingany ofthe ordinary changes and adjustments to interfere in any way withthe spefi or cap or any mechanism within the sie Having thus describedmy invention, I claim:

1. In a pull socket, the combination with a shell and switch mechanism,of a detachable two-part bracket independent of the shell, an operatinglever pivoted to said bracket and an operating bar intermediate theswitch mechanismand the operating lever.

'2. In a pull socket, the combination with insulating blocks, switchmechanism and a hub secured to the insulating blocks, of a two partbracket detachably secured to the hub, an operating leverpivoted to saidbracket and an operating bar intermediate the switch mechanism and theoperating lever.

3. In a pull socket, the combination with an insulated hub, of a bracketdetachably secured to said hub, said bracket comprising members havingdepending arms and an operating member pivoted between said arms.

4.. In a pull socket, the combination with an insulated hub havingrecesses in its face, of a detachable bracket comprising members adaptedto pass within the hub and bers and means for detachably securing thebracket to the hub.

6. In a pull socket, the combination with an insulated hub havingrecesses in its face and in one side a slot, of a bracket comprisingmembers having lugs adapted to engage the recesses and grooves either ofwhich is adapted to aline with the slot in the hub and a U-shapedlocking spring adapted to engage the slot and either of the grooves todetachably lock the bracket to the hub.

7. In a pullsocket, the combination with an'insulated hub, of a bracketcomprising concavo convex members adapted to pass within the hub andhaving depending arms, an operating lever 'loosely' pivoted between thearms leaving the members free. to swing independently when detached, anoperatin bar adapted to engage the operating lever and to be inclosedbetween the socket members and means for detachably locking thebracketto the hub. r

' 8. In a pull socket, the combination with an insulated hub havingrecesses in its face and in one side a slot, of a bracket comprisingconcavo-convex members having dependingarms, each member having a lug toengage-one of thevrecesses. and a groove,

an operating lever loosely pivoted between the arms leaving the membersfree to swing independently when detached, an operating bar adapted toengage the operating lever and to be inclosed between the members and aU-shaped locking spring adapted to engage the slot and one of thegrooves to detachably look the bracket to the hub.

9. In a pull socket, the combination with an insulated hub, a bracketcomprising concavo-convex members having depending arms, an operatingleverloosely pivoted between the arms leaving the members free to swingindependently when detached, an

ahook and adapted to lie in the recess, an

operating bar adapted to engage the hook and to be inclosedby themembers and means for detachably securing the bracket to the hub. y

In testimony whereof I affix my signature in presence of two witnesses.

HARVEY HUBBELL.

Witnesses:

S. W. ATHERTON,

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of .Patents,

Washington, D. G."

